Band pass filter
US6903632B2 · kind B2 · utility
6Cited by
2References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2003 |
| Grant date | Jun 7, 2005 |
| Priority date | — |
| Expiry date | Sep 24, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01P1/20381
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A band pass filter configured by a planar structure circuit, includes resonators of distribution constant circuit type, transmission line paths coupling the resonators and excitation lines arranged at input/output sides. The transmission line path is provided with line path portions coupling the resonators or the resonator and the excitation line. The line path portion have a length which is (1+2m)/4-fold (m: natural number) of a wavelength corresponding to a center frequency of the frequency band, and each coupling part between the resonators and the line portion has a length substantially determined as a ¼ wavelength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.